CVE-2026-120845: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in WPMU DEV

Q: How do I fix CVE-2026-120845?

smush image compression and optimization: upgrade to newer than 4.3.5. Exact commands for each OS are on this page.

Q: Is CVE-2026-120845 being exploited?

CVE-2026-120845 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-120845 affect?

CVE-2026-120845 affects smush image compression and optimization. Severity is medium (CVSS 6.5). Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in WPMU DEV Smush Image Compression and Optimization wp-smushit allows Stored XSS.This issue affects Smush Image Compression and Optimization

Q: How urgent is CVE-2026-120845?

Priority 23/100. No elevated risk signals yet.

Routine

MEDIUM 6.5UPGRADE

CVE-2026-120845 is a medium-severity flaw (CVSS 6.5) affecting smush image compression and optimization. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in WPMU DEV Smush Image Compression and Optimization wp-smushit allows Stored XSS.This issue affects Smush Image Compression and Optimization: from n/a through 4.3.5.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	6.5 (Medium)
EPSS exploit chance	n/a
CISA exploited list	No
Weakness	CWE-79
Published	2026-11-06
Last modified	2026-11-06

Publisher (CNA): Patchstack · Vendor: wpmu dev · Source: CVE Program record (NVD analysis pending)

Last updated 2026-11-06 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-11-06 22:30 UTCPublished CVE record published
2026-11-06 22:30 UTCUpdated Record last modified

wpmu dev smush image compression and optimization UPGRADE

Affected: <= 4.3.5

Fixed in: newer than 4.3.5

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy smush-image-compression-and-optimization || rpm -q smush-image-compression-and-optimization || smush-image-compression-and-optimization --version

2. UPGRADE to newer than 4.3.5 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade smush-image-compression-and-optimization

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade smush-image-compression-and-optimization

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-120845?

smush image compression and optimization: upgrade to newer than 4.3.5. Exact commands for each OS are on this page.

Is CVE-2026-120845 being exploited?

CVE-2026-120845 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-120845 affect?

CVE-2026-120845 affects smush image compression and optimization. Severity is medium (CVSS 6.5). Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in WPMU DEV Smush Image Compression and Optimization wp-smushit allows Stored XSS.This issue affects Smush Image Compression and Optimization

How urgent is CVE-2026-120845?

Priority 23/100. No elevated risk signals yet.

Related CVEs

CVE-2022-1009 MEDIUM 6.1 UPGRADE The Smush WordPress plugin before 3.9.9 does not sanitise and escape a configuration parameter before outputti
CVE-2017-15079 HIGH 7.5 UPGRADE The Smush Image Compression and Optimization plugin before 2.7.6 for WordPress allows directory traversal.

References

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